@ansj64 Hi, thanks for posting question here. It is hard to say addming another Deco unit helps the overall performance, according to your information. This guide may help a little: How can I find a...

@PedroAonsecurit Hi, welcome to our community. When did you purchase the adapter? You may follow Case1 in this guide to troubleshoot: What should I do if the TP-Link network adapter is not working...

@Koushik7788 Sorry, I thought I was clear enough to explain that. Yes, it is suggested to downgrade to the 1.14.0 beta firmware manually for a try. Thanks for your cooperation.

@Sneakdante Hi, welcome to our community. To assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please...

@jorudas Hi, thanks for your update. To assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay...

@MarcoMicio Hi, welcome to our community. To assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please...